Damping member for rolling guide device and seismic isolation structure utilizing same

Abstract

Provided is a damping member which can be easily mounted to a rolling guide device already in use, can avoid an increase in size of the rolling guide device, and can easily enhance a damping force in an axial direction exerted by the rolling guide device. The damping member is applied to the rolling guide device in which a moving block is assembled to a track rail through intermediation of a plurality of rolling elements, is provided to the track rail in series with the moving block, and includes: a friction member which includes a sliding contact pad in contact with at least the track rail; and a fixing holder, which includes a holding portion configured to cover the friction member so as to press the sliding contact pad against the track rail, and is configured to couple the friction member to the moving block.

The invention claimed is: 
     
       1. A damping member for a rolling guide device,
 the rolling guide device including:
 a track rail; and 
 a moving block, which is assembled to the track rail through intermediation of a plurality of rolling elements, and is configured to move along the track rail, 
 
 the damping member comprising: 
 a friction member which includes a sliding contact pad in contact with at least the track rail; and 
 a fixing holder, which is configured to press the friction member against the track rail and couple the friction member to the moving block, 
 the damping member being provided to the track rail in series with the moving block, 
 wherein the fixing holder includes:
 a holding portion which includes a pressing plate configured to press the sliding contact pad against the track rail and cover the track rail from above the friction member; and 
 a pair of coupling arms which extends from the holding portion along a longitudinal direction of the track rail to hold the moving block, and 
 
 wherein the friction member includes a thick portion positioned between the holding portion of the fixing holder and the moving block, and 
 wherein, in movement of the moving block along the track rail, any one of the moving block and the fixing holder presses the thick portion of the friction member in the longitudinal direction of the track rail. 
 
     
     
       2. The damping member for a rolling guide device according to  claim 1 , wherein the pair of coupling arms of the fixing holder has flexibility, and a locking claw, which is caught on an end surface of the moving block, is provided at a distal end of each coupling arm. 
     
     
       3. The damping member for a rolling guide device according to  claim 2 ,
 wherein the friction member includes:
 a pair of sliding contact pads in contact with both side surfaces of the track rail; and 
 a pressure receiving plate in contact with an upper surface of the track rail, and 
 
 wherein the track rail is pressed by the pair of sliding contact pads and the pressure receiving plate from three directions. 
 
     
     
       4. A seismic isolation device, comprising:
 a lower table mounted to a fixing portion; 
 an upper table having a seismic isolation object placed thereon; 
 a first track rail provided to the lower table so as to extend along an X-direction; 
 a second track rail provided to the upper table so as to extend along a Y-direction orthogonal to the X-direction; 
 a composite guide member assembled to the first track rail and the second track rail through intermediation of a plurality of rolling elements; and 
 a pair of damping members provided to the first track rails and the second track rails in series with the composite guide members, 
 wherein each damping member includes:
 a friction member which includes a sliding contact pad in contact with at least one of the first track rail and the second track rail; and 
 a fixing holder, which is configured to press the friction member against the first track rail or the second track rail and couple the friction member to the composite guide member, and is provided to the first track rail or the second track rail in series with the composite guide member, 
 
 wherein the fixing holder includes:
 a holding portion which includes a pressing plate configured to press the sliding contact pad against the first track rail or the second track rail and cover the track rail from above the friction member; and 
 a pair of coupling arms which extends from the holding portion along a longitudinal direction of the first track rail or the second tack rail to hold the composite guide member, and 
 
 wherein the friction member includes a thick portion positioned between the holding portion of the fixing holder and the composite guide member, and 
 wherein, in movement of the composite guide member along the first track rail or the second track rail, any one of the composite guide member and the fixing holder presses the thick portion of the friction member in the longitudinal direction of the first track rail or the second track rail.